Hydraulic wheel puller



1967 H. E. POWELL 3,337,943

HYDRAULI C WHEEL FULLER Filed June 7, 1965 Harvey E. Pawel/ United States Patent 3,337,943 HYDRAULIC WHEEL PULLER Harvey E. Powell, 1002 S. 33rd St., Fort Dodge, Iowa 50501 Filed June 7, 1965, Ser. No. 461,730 1 Claim. (Cl. 29-252) The present invention, while relating broadly to hydraulically operable pulling device in general, has for its main objective the provision of a new and novel hydraulic device of few parts, simple in construction and operation, for stripping wheels, gears, sheaves and the like from a shaft.

Another object of this invention is to provide a hydraulic wheel puller which will pull constant pressure during the pulling operation.

Another object of this invention is to provide a hydraulic wheel puller which may be adjusted to various lengths of shaft on which a gear or wheel is to be removed from and the device will operate in a horizontal position as well as in an upright position.

Still another object of this invention is to providea hydraulic wheel puller which will save a maximum amount of time whereas in screw type pullers more effort and time is consumed in order to adjust and reset for a shorter pull as the gear or sheave is pulled through the end of the shaft.

Other objects and advantages of the invention will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawing wherein a saitsfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claim.

In the drawing: 7

FIGURE 1 is a vertical view of this invention shown in elevation.

FIGURE 2 is a side view of FIGURE 1.

FIGURE 3 is a side elevational view showing a modified form of the invention.

According to this invention, a hydraulic wheel puller is provided with a hydraulic cylinder 11 having a base 12. Hydraulic cylinder 11 is provided with ram member 13 on a threaded shaft which may be adjusted by rotating to fit various lengths of shafts having a wheel, gear, etc. A pair of oppositely opposed arms 14 are secured to the sides of cylinder 11 and are pivotably secured by pivot pins 15 to a short arm 16 which is secured by pivot pins 17 to a claw 18. The claws 18 have their hook ends facing each other towards shaft 13 of cylinder 11. Adjustment means for the claws 18 is provided for by a plurality of spaced apart openings 19 through claws 18 allowing for repositioning of pins 17. A pump handle 20 upon base 12 of hydraulic cylinder 11 provides a means for applying pressure to a piston (not shown) which contacts the shaft hydraulically in order to remove a pulley etc. A release valve 21 upon base 12 allows for release of the hydraulic pressure built up by pump handle 20 after the gear, pulley, or other device is removed from the shaft of a machine etc. A handle22 is secured to the outer periphery of the cylinder 11 and thus allows the worker to easily transport hydraulic wheel puller 10.

In order to remove a pulley and so on from the shaft the claws 18 are placed behind the pulley and the ram member 13 on the shaft of hydraulic cylinder 11 which is operated by hydraulic pressure is placed against the end of the shaft containing the pulley and by pumping 3,337,943 Patented Aug. 29, 1967 the handle 20 hydraulic pressure urges shaft and ram member 13 outwards of hydraulic cylinder 11 and the claws 18 thus remaining stationary will remove the pulley from its shaft.

Looking now at FIGURE 3 of the drawing, one will see that a modified form of wheel puller 30 is provided with a base 31 which contains a foot pedal 32 enabling a worker to build up hydraulic pressure for operating wheel puller 30. The foot pedal 32 allows the hydraulic fluid within flexible hose 33 attached to base 31 to force against the piston (not shown) within hydraulic cylinder 34. The shaft 35 extending from hydraulic cylinder 34 being attached to a piston of cylinder 34 is urged outwardly of cylinder 34 against a shaft containing a pulley or gear etc. A pair of oppositely opposed arms 36 are secured to the outer periphery of cylinder 34 and are pivotably received by pins 37 which are connected to a pivotable arm 38. One end of arm 38 receives a pivot pin 39 which is received by claws 40 having a plurality of spaced apart openings 41, allowing for adjustment of the length thereof.

When using hydraulic wheel puller 30 the hydraulic cylinder 34 being attached by flexible hose 33 allows the claws 40 to be placed anywhere while the base 31 of the device may remain stationary. The operator, in order to apply hydraulic pressure to shaft 35 of cylinder 34 builds up pressure within the device by urging downwardly upon foot pedal 32. It will be noted that various types of hydraulic pressure relief valves may be employed to release the hydraulic pressure upon shaft 35.

What I now claim is:

A hydraulic wheel puller comprising, in combination, a hydraulic cylinder having hand pump means to build up hydraulic pressure, a pair of claws for engaging a wheel to be pulled, adjustable ram means for cooperating with different wheel shafts when said claws are engaging said wheel, a circular base for supporting said cylinder thereon, handle grip means secured to said cylinder for transporting said wheel puller, said ram means being on the end of a threaded shaft received within said cylinder, a piston contacting said shaft positioned within said cylinder and being adapted to operably communicate with said ram means thus allowing adjustmentof the shaft of said wheel to be removed therefrom, a pair of oppositely disposed arms secured to the outer periphery of said hydraulic cylinder a pair of outwardly extending short arms adapted to pivotably engage said other arms for angular disposition thereof, a pivot pin arranged to secure each of said arms; to its respective short arm, a claw attached to each of said arms, said claws provided with oppositely disposed hooks for engaging them behind said wheel to be pulled from said wheel shaft, said claws being provided with a plurality of uniformly spaced-apart openings for allowing to adjust the length of each of said claws to accommodate wheels of various diameters and wheel shafts of different lengths in cooperation with said ram member, and a relief valve member extending outwardly from said base for regulating the pressure within said cylinder.

References Cited UNITED STATES PATENTS 1,026,548 5/ 1912 Allien 29-252 1,777,6 16 10/ 1930 Hommel 29--25 2 2,003,648 6/ 1935 Frye et a1 29-252 3,069,761 12/1962 Sommer 29252 WILLIAM FELDMAN, Primary Examiner. MYRQN C- KRUSE, Examiner. 

